ng4-import-js

//component.ts

import { Component } from '@angular/core';

declare var foo: any;

import '../assets/foo.js';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'app works!';

  a = 1;
  b = 2;
  fooObj: any;
  constructor() {
        this.fooObj = new foo(1, 3);
        foo(11, 31);
         
    }


    c = new foo(2,3);

    myFunc(a,b){
        foo(a,b);
        foo(this.a,this.b);
    }

}